[WFRP4e System] Disease Symptom handling causes strange issues

[moo-man]

When creating a new disease if any undefined symptoms or text are entered in the "Symptoms" section strange behaviors can occur if other ,system defined, symptoms are also added. This can result in things such as a maximum of 4 or5 symptoms displaying, or "Invoke Blight" button changing to the name of the undefined symptom.

To reproduce: Create a new disease. Add 1 custom and 5 system defined symptoms. For the button change, list the custom symptom first, then Blight anywhere after it. The button name will change to the symptom directly preceding Blight.

Further discussion here: https://discord.com/channels/787396882875416606/787397718339223603/1183828395805638697
From: RassilonMonk
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wfrp4e: 7.0.3
wfrp4e-core: 4.0.2
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